Boring and drilling machine.



L. G. MQKNIGHT. BOEING AND DRILLING momma, APPLIGATIOII TILED SEPT. 12, 1910 1,113,804. Patented Oct. 13, 1914.

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L. G. MoKNIGHT.

BORING AND DRILLING MACHINE.

APPLICATION FILED snPT. 12, 19104 1, 1 1 3,804. Patented 001;; 13, 1914.

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L, G. MoKNIGHT.

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BORING AND DRILLING MACHINE. APPLICATION FILED SEPT. 12, 1910.

Patented 0ct.'13, 1914.

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THE NORRIS PETERS C0,. PHOm-LITHQ. WASHINGTON, D. cv

L.G.M0KNIGHT.

BORING AND DRILLING MACHINE.

APPLICATION FILED SEPT. 12, I910.

1 1 1 3,804. Patented Oct. 13, 1914.

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L. G. MOKNIG'HT.

BORING AND DRILLING MACHINE.

APPLICATION FILED $111 112, 1910.

1,1 1 3,804. Patented 001. 13, 1914.

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mwqmv QM THE NORRIS PETERS CO1. FHOTU-LITHQ, WASHINLFTON. D. C,

L. G. MoKNIGHT.

BORING AND' DRILLING MACHINE.

APPLICATION PIL'ED SEPT; 12, 1910. 1, 1 1 3,8041.

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Patented Oct. 13, 1914.

L. G. MOKNIGHT.

BORING AND DRILLING MACHINE.

APPLICATION FILED SEPT. 12, 1910.

1 1 1 3,804.. Patented 001;. 13, 1914.

7 SHEETS-SHEET 7.

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nivirnn srn'rns PATENT orrion.

LEVI G. MOKNIGHT, OF GAIEKDNELR, MASEZAGHUEETTS, ASSIGNGE TO L. G. McKNIGI-IT 86 SQN 00., F GARDNER, InASSACE-IUSETTS, it. CORPORATION OF MAINE.

BORING AND DRILLING MACHINE.

aliases.

Specification of Letters Patent.

Patented Oct. 13, 1914:.

To aZZ whom it may concern:

lie it known that 1, LEVI G. Moliln Iei-rr, a citizen of the United States, residing at Gardner, in the county of Worcester and State of ll lassachusetts. have invented anew and useful Boring and Drilling Machine, of which the following is a specification.

his invention. while capable of general use, is particularly adapted for wood working and especially for the drilling of chair legs and other articles in which a plurality of holes are drilled simultaneously and at least two of them are located very near each other.

It is also applicable to the simultaneous drilling of holes in a plurality of sides of the chair leg or the like.

The principal objects of the invention are to provide a simple and compact means for holding a drill on a spindle of such a nature that two or more drills can be located very close to each other; to provide practicable and efficient means whereby two drill spindles very close together can be operated and adjusted; to provide simple means for feeding a cross head. forward with the rotating drills thereon in such a way that the fee will be uniform and the power will-be im parted to the drills in the same way in the different positions; to provide for simultaneously feeding drills forward horizontally and other drills down vertically to drill voles in two sides of a single article; to pro-- vide simple and practicable means for throw out the feed both by hand and automatically in such a way as always to leave the hits back away from the work and capable of being rendercd inoperative in a very simple manner so that the machine can continue to operate on a plurality of pieces of work; to provide means for reversing so that the bits can be moved back out of the holes and then reintroduced into them; to provide angular adjustment for the bits; and to provide simple form of clamp for holding the work while being bored only.

Tie invention also involves various features of construction and details thereof as will appear hereinafter.

Reference is to be had to the accompanying drawings in which- Figure 1 is a side elevation of a drilling machine constructed in accordance with this invention. Fig. 2 is a front elevation of the same. Fig. 3 is a partial side elevation of two closely associated drills.

the same on an enlarged-scale. Fig. 4t is a perspective view of one element. Fig. 5 is a partial side view similar to Fig. 1 on an ci'ilarged scale. Fig. 6 is a sectional view on the line 6-6 of Fig. 5. Fig. 7 is a plan of a portion thereof. Fig. 8 is sectional view on the line 8-8 of Fig. 5. Fig. 9 is a front elevation of the mechanism for connecting Fig. 10 is a side view of the same partly in section. Fig. 11 is a front view partly in section of a device for holding one of'the drills. Fig. 12 is a plan of the driving connections for the vertical drills. Fig. 13 is a side view of the front of the machine showing the side opposite that shown in Fig. 1. Fig. 1 f is a side view of a modification: and Fig. 15 is a front view thereof. 16 is a side view of a portion of the eccentric; and Fig. 17 is an edge view thereof.

The invention is shown in a form in which a frame 10 (Fig. 1) is provided with a power shaft 11 on which are located tight and loose pulleys 12 and 18, respectively for receiving power. On this shaft are located four tight pulleys 14., 15, 16 and 16. The pulleys 14 and 15 are provided with belts one of which passes over the idlers 17 and 18 (Figs. 1 and 12) and the other over idlers 19 (Fig. 1). The belts pass respectively to a series of long faced pulleys 20 and 21, the pulleys 20 being located on vertical axes and the pulleys 21 on horizontal axes. These belts in passing over these pulleys which are in alinement, also form loops and pass back over idlers 22. The idlers 18 and 19 canbe adjust-ed by means of screws 24 or the like tolreep the belts tight. The purpose of the pulleys '20 and 21 will be described hereinafter.

The pulleys lfiare connected by straight and cross belts respectively to pulleys 25 on a feed shaft 26. A lever 27 is provided to connect either of these pulleys with the shaft to rotate it in either direction. By means of a pulley 28 the shaft 26 drives a clutch pulley. 29 mounted to freely rotate on a clutch shaft 30. A clutch cone 31 is slidably keyed to this shaft for the purpose of positively connecting the pulley 29 with it. A bell-crank or lever 32 is mounted near the front of the machine and projects out to such position that the operator can step on the front treadle 33 to operate it. It is connected by a link 84, (Fig. 5) lever 35, link 36 and lever 37 with a sliding spring pressed rod 38 on which is a yoke 39 for operating 1 the clutch 31 in a well known way. When clutch in. The shaft 30 cannot be the operator steps on the lever 33 he closes the clutch and connects the wheel 29 with the shaft 30.- When he steps off the treadle the spring tends to open the clutch. In order to hold the clutch in when the operator steps off the treadle, provided. Journaled on the frame is an oscillatable rod 40 (Figs. 1 and 5) having a handle dl and a crank 422. The latter is connected' by links 43 with a rock shaft 4a (Figs. 5 to 3) having an arm 45 thereon connected by a link 46 with adog 47. Normally gravity acts on these parts to raise this dog behind the yoke 39 to hold the stopped while the main shaft is rotating without moving the dog out.

On the shaft30 is a worm 50 (Figs. 5 ant 6) operating a worm wheel 51 on a shaft 5 which, by gears, rotates a shaft carryin an eccentr'c 54 (Fig. 1). This eccentric be ing set into rotation in this way operates a link 53 connected Wltll, a head 56 which is adjustably fixed on a vertical rod 57. The eccentric has a radial slot with a. screw 58 (Figs. 16 and 17) therealong and a head 59 adjustable on the screw. This is connected with the link 55 having on each end a spherical socket joint formed by a half plate integral with. the link and a cap 61 screwed on. On the head 59 and head 56 are balls to fit in these sockets. The rod 57 is connected with a pivoted link 63 at the bottom and with two levers 62 and (i l, the latter of which is shown as counter-weighted. These levers are mounted on rock shafts having arms 65 and 66 respectively. The lever 62 and arms 65 are connected by links 67 with horizontally reciprocatory slides 68. The le- Ver 64 and arms 66 are connected by similar links with vertically reciprocatory slides 69.

Connected with the links 43 where they are pivoted together is a link 70, the other end of which is pivoted to a bracket 71 on the frame, on which the shaft 53 has a hearing (Fig. 6). On this link is a rest 72, and pivoted on the link is a dog 73. On the gear on the shaft 53 is a projection 74 which comes into contact with the dog 7 5 once during each revolution. This raises the link 43 and draws back the dog 47 to stop the machine automatically at the end of a complete revolution. If it is not desired to do this the dog 73 is swung back out of the path of the projection 74.

The means for supporting the longitudinal and vertical spindle frames are similar and only one of them need be described in detail. On the front of the frame 10 area pair of brackets 75 provided with removable p'lates 76 (Fig. 3). The plates have bearings 77 above and below for the slides 69. Fixed to the slides between the bearings Lowthe following mechanism is is a cross head 770 which supports the several spindle frames 72. Owing to the fact that these frames have to be at right angles to the cross head they can be supported substantially at only one point and this presents a difficult problem. In order properly to support them the cross head has a longitudinal groove 79 on the top in which set ribs 80 on shoes or hearing blocks 31. These shoes are provided also with transverse ribs 82 on top each of which extends into a groove in the bottom of each one of the spindle frames. lVith this construction it will be seen that when. the spindle frames are clamped in position by the bolts 83 they cannot turn in either direction. The cross head also has a T slot 84 on the front to which the frames are secured by headed screws 85. In the present instance there are two frames 78 near the ends of the cross head each carrying a spindle 86 for holding a drill. A pair of central frames 87 (Figs. 9 and 10) are fixed in position on the crosshead in the same way,

and support spindles 86 in the same manner as is the case with the outside frames. On the several spindles 86 are the pulleys 20. On some or all of the spindle frames are adjustable spring pressed work holding plungers 88 set to engage the work before the drills.

In order that the central drills may be set closer together than the distance between the centers of the pulleys 20, each of these spindles has a gear 89 meshing with a pinion 90 on the drill spindle 91. In this case the spindle frame is provided with the necessary hearings to accommodate the extra spindle.

In order to provide for holding the drills on their spindles in such a way that the two drill spindles can be brought up nearly into contact with each other, thus permitting the two holes to be drilled very close together, the following arrangement is provided. Each of these spindles 91 (Fig. 11) is provided with a passage for the shank of the drill and a perforation 95 in which a tool may be inserted to loosen the drill. each spindle is screw threaded at the bottom and is provided with an internal screw, threaded cap 96 fitting thereon. This cap is constructed at the bottom so as to fit the drill itself and provide a ledge 97 for a split ring 98 which is snapped over the shank of the drill so as to fit in a groove located at the bottom of said shank. By this construction it will be seen that the drill is first passed down through the cap 96 with the ring 98 in position until it rests on the ledge 97. This cap is then placed in position on the screw threaded lower end of the spindle and can be screwed up as tight as desired so as to hold the drill. The upper part of the socket for receiving the drill shank is shaped to receive the shank in such a way as positively to cause the drill to turn with the spindle.

The cap 96 is provided with slabbed sides 99 so that it can be screwed on by a wrench. (See Fig. 10.) The horizontal reciprocatory spindle frames are similarly constructed, being mounted on brackets 100 (Fig. 1) i)rovided with hubs 101 at the front and rear bolted thereto, and through which the slides 68 pass.- On these slides is supported a cross head 102 carrying brackets 103 (Fig. 3) which extend to the front and rear and are provided with hubs in which the spindles 104s are ournaled. The other features are substantially the same as those described with respect to the vertical frame.

In Figs. 14 and 15 I have shown a modification suitable for use when the drill is to be swung on an angle for drilling inclined holes. In this case, the drill spindle frame 110 is swiveled on a support 111 which is mounted on the cross-head 770 in the manner heretofore described. The drill spindle is held by the frame 110 and reciprocated as has been stated heretofore, the difference being the use of a swiveled connection 112 for connecting it with the operating lever. In this case, however, the pulley 113 is spherical and it swings obviously with the frame 110. The frame 110 is held in its adjusted, angular position by a fastening bolt 114 fastened through a curved slot 115 carried by the support 111. If it is desired to swing the drill through an angle in another plane the support 111 instead of being all in one piece, is provided with a movable bracket 116 which is swiveled on the support and provided with a fastening screw 117 fastened through a curved slot 118 on the support 111.

The operation of the machine will be obvious. Ordinarily, before the machine starts, the lever 27 will be in proper position to cause the feed shaft to be driven in the usual direction by one of the pulleys 16. One or more pieces of work being placed on the work table up against gages 118 thereon, the operator shifts the belt from the loose pulley 13 to the tight pulley 12, if that has not already been done. Then he steps on the treadle 33 which closes the clutch 31 as has been described. When the clutch is closed, the dog at 17 will swing by gravity into position behind the yoke 39 so that the clutch will be held closed until the operator moves the handle ll to open the clutch or the shaft 53 completes one revolution. It will be understood that the operator may release his foot from the treadle 33 at any time without affecting these functions. When the handle 41 is operated to draw the dog 47 out from behind the yoke, the spring 38 will open the clutch and stop the feed, but during that time the drills will continue to rotate without being fed. If while the machine is drilling it is desired to Withdraw the drills and reinsert' them, this is accomplished by moving the handle 27 into 1 position to reverse the feed shaft. In this way thefeed has to take place in the opposite direction without reversing the drills so that the drills will take the chipsback with .them and clear out the holes. Then the operator can againreverse the feed and set the drills back in the clean holes. This is a very important feature in certain classes of work. in the ordinary way the drills will be fed forward and downward at a uniform speed while they rotate. If the speed of rotation increases or decreases, the feed will increase or decrease in like proportion so that there is no danger of feeding too fast and no time is lost by feeding too slowly. As the drills near the work the plungers 88 engage it and hold it in position before the drills start to enter.

While the machine is operating that a comparatively simple and'compact machine is provided which in the form illustrated willsimultaneously bore a number of holes in each chair leg, half of the holes being in one side and half in another; also that the operator has full control of the feed of the drills, and can start the machine when he desires and stop it at will, and that he can set it so that the drills will continue to rotate when the feed is stopped until he stops the machine by shifting the belt from the tight to the loose pulley, which he can do in the usual way. The" provision of means whereby the pair of drill spindles portant feature.

I/Vhile I have illustrated and described a preferred embodiment of the invention and only a single modification thereof I am aware that many modifications canbe made therein by any person skilled in the art without departing from the scope of the invention as expressed in the claims. Therefore I do not wish to be limited to all the details of construction herein shown and described, but

What I do claim is 1. A boring and drilling machine having in combination, a shaft, means including areversing clutch to drive said shaft in either direction, a clutch shaft, drill feeding cle- 2. -A boring and drilling machine having in combination a shaft, means including a reversingclutch to drive said shaft in either direction, a clutch shaft, drill feeding devices operable thereby, a rotatable member loosely mounted on said clutch shaft and driven from said first named shaft, a clutch effective ,to connect said rotatable member to said clutch shaft, means including a yoke for operating said clutch, normally yieldingly held in inoperative position, manually operated means to move said yoke to close the clutch, means to hold the yoke in operative position, an automatic device to release said yoke at a predetermined point in the operation of the machine, and means to render said automatic device inoperable at will.

3. A boring and drilling machine having in combination a shaft, means including a reversing clutch to drive said shaft in either direction, a clutch shaft, drill feeding devices operable thereby, a rotatable member loosely mounted on said clutch shaft and driven from said first named shaft, a clutch "effective to connect said rotatable member to; said clutch shaft, means including a yoke foroperating said clutch, normally yieldinglyfheld in inoperative position, manually operated means to move said yoke to close the. clutch, means'to hold the yoke in operative positio-n, an automatic device to re- ,lease said yoke at a predetermined point in the operation of the machine, and means to render said automatic device inoperable at will, said last named means including a retating' cam lug, a releasing lever located whollyoutside of the path of said lug, and

a lever extension hinged to said lever and movable at will into the path of said lu 4. A drilling and boring machine having in combination a frame, brackets fixed to said f ame, rods mounted to slide vertically in said brackets, a cross head secured to said rods, spindle frames secured to said cross head, and a bearing block for each spindle frame, said cross head having a longitudinal groove in its upper surface, said spindle frames each having a groove in its under surface transverse to said cross head, and said bearing blocks each having ribs on its upper and lower faces fitting said grooves and, holding a spindle frame in rectilinear relation to said cross head.

5. A drilling and boring machine having in combination a frame, brackets fixed to said frame, rods mounted to slide vertically in said brackets, a cross head secured to said rods, and spindle frames secured to said cross head, said cross head having a T-slot in its front side and said spindle frame having a headed screw threaded therein, the head fitting the slot and the screw being effective toadjust the frame relative to the cross head.

In testimony whereof I have hereunto set my hand, in the presence of two subscribing witnesses.

LEVI G. MoKNIG-I-IT.

Witnesses ALBERT E. FAY, C. Fonnnsr Wesson.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, I). C. 

